1 /*
2 * Copyright 2008 Intel Corporation <hong.liu@intel.com>
3 * Copyright 2008 Red Hat <mjg@redhat.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NON-INFRINGEMENT. IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
22 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * SOFTWARE.
25 *
26 */
27
28 #include <linux/acpi.h>
29 #include <linux/dmi.h>
30 #include <linux/firmware.h>
31 #include <acpi/video.h>
32
33 #include <drm/i915_drm.h>
34
35 #include "display/intel_panel.h"
36
37 #include "i915_drv.h"
38 #include "intel_display_types.h"
39 #include "intel_opregion.h"
40
41 #define OPREGION_HEADER_OFFSET 0
42 #define OPREGION_ACPI_OFFSET 0x100
43 #define ACPI_CLID 0x01ac /* current lid state indicator */
44 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
45 #define OPREGION_SWSCI_OFFSET 0x200
46 #define OPREGION_ASLE_OFFSET 0x300
47 #define OPREGION_VBT_OFFSET 0x400
48 #define OPREGION_ASLE_EXT_OFFSET 0x1C00
49
50 #define OPREGION_SIGNATURE "IntelGraphicsMem"
51 #define MBOX_ACPI (1<<0)
52 #define MBOX_SWSCI (1<<1)
53 #define MBOX_ASLE (1<<2)
54 #define MBOX_ASLE_EXT (1<<4)
55
56 struct opregion_header {
57 u8 signature[16];
58 u32 size;
59 struct {
60 u8 rsvd;
61 u8 revision;
62 u8 minor;
63 u8 major;
64 } __packed over;
65 u8 bios_ver[32];
66 u8 vbios_ver[16];
67 u8 driver_ver[16];
68 u32 mboxes;
69 u32 driver_model;
70 u32 pcon;
71 u8 dver[32];
72 u8 rsvd[124];
73 } __packed;
74
75 /* OpRegion mailbox #1: public ACPI methods */
76 struct opregion_acpi {
77 u32 drdy; /* driver readiness */
78 u32 csts; /* notification status */
79 u32 cevt; /* current event */
80 u8 rsvd1[20];
81 u32 didl[8]; /* supported display devices ID list */
82 u32 cpdl[8]; /* currently presented display list */
83 u32 cadl[8]; /* currently active display list */
84 u32 nadl[8]; /* next active devices list */
85 u32 aslp; /* ASL sleep time-out */
86 u32 tidx; /* toggle table index */
87 u32 chpd; /* current hotplug enable indicator */
88 u32 clid; /* current lid state*/
89 u32 cdck; /* current docking state */
90 u32 sxsw; /* Sx state resume */
91 u32 evts; /* ASL supported events */
92 u32 cnot; /* current OS notification */
93 u32 nrdy; /* driver status */
94 u32 did2[7]; /* extended supported display devices ID list */
95 u32 cpd2[7]; /* extended attached display devices list */
96 u8 rsvd2[4];
97 } __packed;
98
99 /* OpRegion mailbox #2: SWSCI */
100 struct opregion_swsci {
101 u32 scic; /* SWSCI command|status|data */
102 u32 parm; /* command parameters */
103 u32 dslp; /* driver sleep time-out */
104 u8 rsvd[244];
105 } __packed;
106
107 /* OpRegion mailbox #3: ASLE */
108 struct opregion_asle {
109 u32 ardy; /* driver readiness */
110 u32 aslc; /* ASLE interrupt command */
111 u32 tche; /* technology enabled indicator */
112 u32 alsi; /* current ALS illuminance reading */
113 u32 bclp; /* backlight brightness to set */
114 u32 pfit; /* panel fitting state */
115 u32 cblv; /* current brightness level */
116 u16 bclm[20]; /* backlight level duty cycle mapping table */
117 u32 cpfm; /* current panel fitting mode */
118 u32 epfm; /* enabled panel fitting modes */
119 u8 plut[74]; /* panel LUT and identifier */
120 u32 pfmb; /* PWM freq and min brightness */
121 u32 cddv; /* color correction default values */
122 u32 pcft; /* power conservation features */
123 u32 srot; /* supported rotation angles */
124 u32 iuer; /* IUER events */
125 u64 fdss;
126 u32 fdsp;
127 u32 stat;
128 u64 rvda; /* Physical (2.0) or relative from opregion (2.1+)
129 * address of raw VBT data. */
130 u32 rvds; /* Size of raw vbt data */
131 u8 rsvd[58];
132 } __packed;
133
134 /* OpRegion mailbox #5: ASLE ext */
135 struct opregion_asle_ext {
136 u32 phed; /* Panel Header */
137 u8 bddc[256]; /* Panel EDID */
138 u8 rsvd[764];
139 } __packed;
140
141 /* Driver readiness indicator */
142 #define ASLE_ARDY_READY (1 << 0)
143 #define ASLE_ARDY_NOT_READY (0 << 0)
144
145 /* ASLE Interrupt Command (ASLC) bits */
146 #define ASLC_SET_ALS_ILLUM (1 << 0)
147 #define ASLC_SET_BACKLIGHT (1 << 1)
148 #define ASLC_SET_PFIT (1 << 2)
149 #define ASLC_SET_PWM_FREQ (1 << 3)
150 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
151 #define ASLC_BUTTON_ARRAY (1 << 5)
152 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
153 #define ASLC_DOCKING_INDICATOR (1 << 7)
154 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
155 #define ASLC_REQ_MSK 0x1ff
156 /* response bits */
157 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
158 #define ASLC_BACKLIGHT_FAILED (1 << 12)
159 #define ASLC_PFIT_FAILED (1 << 14)
160 #define ASLC_PWM_FREQ_FAILED (1 << 16)
161 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
162 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
163 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
164 #define ASLC_DOCKING_FAILED (1 << 24)
165 #define ASLC_ISCT_STATE_FAILED (1 << 26)
166
167 /* Technology enabled indicator */
168 #define ASLE_TCHE_ALS_EN (1 << 0)
169 #define ASLE_TCHE_BLC_EN (1 << 1)
170 #define ASLE_TCHE_PFIT_EN (1 << 2)
171 #define ASLE_TCHE_PFMB_EN (1 << 3)
172
173 /* ASLE backlight brightness to set */
174 #define ASLE_BCLP_VALID (1<<31)
175 #define ASLE_BCLP_MSK (~(1<<31))
176
177 /* ASLE panel fitting request */
178 #define ASLE_PFIT_VALID (1<<31)
179 #define ASLE_PFIT_CENTER (1<<0)
180 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
181 #define ASLE_PFIT_STRETCH_GFX (1<<2)
182
183 /* PWM frequency and minimum brightness */
184 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
185 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
186 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
187 #define ASLE_PFMB_PWM_VALID (1<<31)
188
189 #define ASLE_CBLV_VALID (1<<31)
190
191 /* IUER */
192 #define ASLE_IUER_DOCKING (1 << 7)
193 #define ASLE_IUER_CONVERTIBLE (1 << 6)
194 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
195 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
196 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
197 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
198 #define ASLE_IUER_POWER_BTN (1 << 0)
199
200 /* Software System Control Interrupt (SWSCI) */
201 #define SWSCI_SCIC_INDICATOR (1 << 0)
202 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
203 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
204 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
205 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
206 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
207 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
208 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
209 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
210 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
211
212 #define SWSCI_FUNCTION_CODE(main, sub) \
213 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
214 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
215
216 /* SWSCI: Get BIOS Data (GBDA) */
217 #define SWSCI_GBDA 4
218 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
219 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
220 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
221 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
222 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
223 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
224 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
225
226 /* SWSCI: System BIOS Callbacks (SBCB) */
227 #define SWSCI_SBCB 6
228 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
229 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
230 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
231 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
232 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
233 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
234 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
235 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
236 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
237 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
238 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
239 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
240 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
241 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
242 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
243 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
244
245 /*
246 * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices
247 * Attached to the Display Adapter).
248 */
249 #define ACPI_DISPLAY_INDEX_SHIFT 0
250 #define ACPI_DISPLAY_INDEX_MASK (0xf << 0)
251 #define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT 4
252 #define ACPI_DISPLAY_PORT_ATTACHMENT_MASK (0xf << 4)
253 #define ACPI_DISPLAY_TYPE_SHIFT 8
254 #define ACPI_DISPLAY_TYPE_MASK (0xf << 8)
255 #define ACPI_DISPLAY_TYPE_OTHER (0 << 8)
256 #define ACPI_DISPLAY_TYPE_VGA (1 << 8)
257 #define ACPI_DISPLAY_TYPE_TV (2 << 8)
258 #define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL (3 << 8)
259 #define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL (4 << 8)
260 #define ACPI_VENDOR_SPECIFIC_SHIFT 12
261 #define ACPI_VENDOR_SPECIFIC_MASK (0xf << 12)
262 #define ACPI_BIOS_CAN_DETECT (1 << 16)
263 #define ACPI_DEPENDS_ON_VGA (1 << 17)
264 #define ACPI_PIPE_ID_SHIFT 18
265 #define ACPI_PIPE_ID_MASK (7 << 18)
266 #define ACPI_DEVICE_ID_SCHEME (1 << 31)
267
268 #define MAX_DSLP 1500
269
swsci(struct drm_i915_private * dev_priv,u32 function,u32 parm,u32 * parm_out)270 static int swsci(struct drm_i915_private *dev_priv,
271 u32 function, u32 parm, u32 *parm_out)
272 {
273 struct opregion_swsci *swsci = dev_priv->opregion.swsci;
274 struct pci_dev *pdev = dev_priv->drm.pdev;
275 u32 main_function, sub_function, scic;
276 u16 swsci_val;
277 u32 dslp;
278
279 if (!swsci)
280 return -ENODEV;
281
282 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
283 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
284 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
285 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
286
287 /* Check if we can call the function. See swsci_setup for details. */
288 if (main_function == SWSCI_SBCB) {
289 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
290 (1 << sub_function)) == 0)
291 return -EINVAL;
292 } else if (main_function == SWSCI_GBDA) {
293 if ((dev_priv->opregion.swsci_gbda_sub_functions &
294 (1 << sub_function)) == 0)
295 return -EINVAL;
296 }
297
298 /* Driver sleep timeout in ms. */
299 dslp = swsci->dslp;
300 if (!dslp) {
301 /* The spec says 2ms should be the default, but it's too small
302 * for some machines. */
303 dslp = 50;
304 } else if (dslp > MAX_DSLP) {
305 /* Hey bios, trust must be earned. */
306 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
307 "using %u ms instead\n", dslp, MAX_DSLP);
308 dslp = MAX_DSLP;
309 }
310
311 /* The spec tells us to do this, but we are the only user... */
312 scic = swsci->scic;
313 if (scic & SWSCI_SCIC_INDICATOR) {
314 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
315 return -EBUSY;
316 }
317
318 scic = function | SWSCI_SCIC_INDICATOR;
319
320 swsci->parm = parm;
321 swsci->scic = scic;
322
323 /* Ensure SCI event is selected and event trigger is cleared. */
324 pci_read_config_word(pdev, SWSCI, &swsci_val);
325 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
326 swsci_val |= SWSCI_SCISEL;
327 swsci_val &= ~SWSCI_GSSCIE;
328 pci_write_config_word(pdev, SWSCI, swsci_val);
329 }
330
331 /* Use event trigger to tell bios to check the mail. */
332 swsci_val |= SWSCI_GSSCIE;
333 pci_write_config_word(pdev, SWSCI, swsci_val);
334
335 /* Poll for the result. */
336 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
337 if (wait_for(C, dslp)) {
338 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
339 return -ETIMEDOUT;
340 }
341
342 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
343 SWSCI_SCIC_EXIT_STATUS_SHIFT;
344
345 /* Note: scic == 0 is an error! */
346 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
347 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
348 return -EIO;
349 }
350
351 if (parm_out)
352 *parm_out = swsci->parm;
353
354 return 0;
355
356 #undef C
357 }
358
359 #define DISPLAY_TYPE_CRT 0
360 #define DISPLAY_TYPE_TV 1
361 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
362 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
363
intel_opregion_notify_encoder(struct intel_encoder * intel_encoder,bool enable)364 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
365 bool enable)
366 {
367 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
368 u32 parm = 0;
369 u32 type = 0;
370 u32 port;
371
372 /* don't care about old stuff for now */
373 if (!HAS_DDI(dev_priv))
374 return 0;
375
376 if (intel_encoder->type == INTEL_OUTPUT_DSI)
377 port = 0;
378 else
379 port = intel_encoder->port;
380
381 if (port == PORT_E) {
382 port = 0;
383 } else {
384 parm |= 1 << port;
385 port++;
386 }
387
388 if (!enable)
389 parm |= 4 << 8;
390
391 switch (intel_encoder->type) {
392 case INTEL_OUTPUT_ANALOG:
393 type = DISPLAY_TYPE_CRT;
394 break;
395 case INTEL_OUTPUT_DDI:
396 case INTEL_OUTPUT_DP:
397 case INTEL_OUTPUT_HDMI:
398 case INTEL_OUTPUT_DP_MST:
399 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
400 break;
401 case INTEL_OUTPUT_EDP:
402 case INTEL_OUTPUT_DSI:
403 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
404 break;
405 default:
406 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
407 intel_encoder->type);
408 return -EINVAL;
409 }
410
411 parm |= type << (16 + port * 3);
412
413 return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
414 }
415
416 static const struct {
417 pci_power_t pci_power_state;
418 u32 parm;
419 } power_state_map[] = {
420 { PCI_D0, 0x00 },
421 { PCI_D1, 0x01 },
422 { PCI_D2, 0x02 },
423 { PCI_D3hot, 0x04 },
424 { PCI_D3cold, 0x04 },
425 };
426
intel_opregion_notify_adapter(struct drm_i915_private * dev_priv,pci_power_t state)427 int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
428 pci_power_t state)
429 {
430 int i;
431
432 if (!HAS_DDI(dev_priv))
433 return 0;
434
435 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
436 if (state == power_state_map[i].pci_power_state)
437 return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE,
438 power_state_map[i].parm, NULL);
439 }
440
441 return -EINVAL;
442 }
443
asle_set_backlight(struct drm_i915_private * dev_priv,u32 bclp)444 static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp)
445 {
446 struct intel_connector *connector;
447 struct drm_connector_list_iter conn_iter;
448 struct opregion_asle *asle = dev_priv->opregion.asle;
449 struct drm_device *dev = &dev_priv->drm;
450
451 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
452
453 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
454 DRM_DEBUG_KMS("opregion backlight request ignored\n");
455 return 0;
456 }
457
458 if (!(bclp & ASLE_BCLP_VALID))
459 return ASLC_BACKLIGHT_FAILED;
460
461 bclp &= ASLE_BCLP_MSK;
462 if (bclp > 255)
463 return ASLC_BACKLIGHT_FAILED;
464
465 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
466
467 /*
468 * Update backlight on all connectors that support backlight (usually
469 * only one).
470 */
471 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
472 drm_connector_list_iter_begin(dev, &conn_iter);
473 for_each_intel_connector_iter(connector, &conn_iter)
474 intel_panel_set_backlight_acpi(connector->base.state, bclp, 255);
475 drm_connector_list_iter_end(&conn_iter);
476 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
477
478 drm_modeset_unlock(&dev->mode_config.connection_mutex);
479
480
481 return 0;
482 }
483
asle_set_als_illum(struct drm_i915_private * dev_priv,u32 alsi)484 static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi)
485 {
486 /* alsi is the current ALS reading in lux. 0 indicates below sensor
487 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
488 DRM_DEBUG_DRIVER("Illum is not supported\n");
489 return ASLC_ALS_ILLUM_FAILED;
490 }
491
asle_set_pwm_freq(struct drm_i915_private * dev_priv,u32 pfmb)492 static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb)
493 {
494 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
495 return ASLC_PWM_FREQ_FAILED;
496 }
497
asle_set_pfit(struct drm_i915_private * dev_priv,u32 pfit)498 static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit)
499 {
500 /* Panel fitting is currently controlled by the X code, so this is a
501 noop until modesetting support works fully */
502 DRM_DEBUG_DRIVER("Pfit is not supported\n");
503 return ASLC_PFIT_FAILED;
504 }
505
asle_set_supported_rotation_angles(struct drm_i915_private * dev_priv,u32 srot)506 static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot)
507 {
508 DRM_DEBUG_DRIVER("SROT is not supported\n");
509 return ASLC_ROTATION_ANGLES_FAILED;
510 }
511
asle_set_button_array(struct drm_i915_private * dev_priv,u32 iuer)512 static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer)
513 {
514 if (!iuer)
515 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
516 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
517 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
518 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
519 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
520 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
521 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
522 if (iuer & ASLE_IUER_WINDOWS_BTN)
523 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
524 if (iuer & ASLE_IUER_POWER_BTN)
525 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
526
527 return ASLC_BUTTON_ARRAY_FAILED;
528 }
529
asle_set_convertible(struct drm_i915_private * dev_priv,u32 iuer)530 static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer)
531 {
532 if (iuer & ASLE_IUER_CONVERTIBLE)
533 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
534 else
535 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
536
537 return ASLC_CONVERTIBLE_FAILED;
538 }
539
asle_set_docking(struct drm_i915_private * dev_priv,u32 iuer)540 static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer)
541 {
542 if (iuer & ASLE_IUER_DOCKING)
543 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
544 else
545 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
546
547 return ASLC_DOCKING_FAILED;
548 }
549
asle_isct_state(struct drm_i915_private * dev_priv)550 static u32 asle_isct_state(struct drm_i915_private *dev_priv)
551 {
552 DRM_DEBUG_DRIVER("ISCT is not supported\n");
553 return ASLC_ISCT_STATE_FAILED;
554 }
555
asle_work(struct work_struct * work)556 static void asle_work(struct work_struct *work)
557 {
558 struct intel_opregion *opregion =
559 container_of(work, struct intel_opregion, asle_work);
560 struct drm_i915_private *dev_priv =
561 container_of(opregion, struct drm_i915_private, opregion);
562 struct opregion_asle *asle = dev_priv->opregion.asle;
563 u32 aslc_stat = 0;
564 u32 aslc_req;
565
566 if (!asle)
567 return;
568
569 aslc_req = asle->aslc;
570
571 if (!(aslc_req & ASLC_REQ_MSK)) {
572 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
573 aslc_req);
574 return;
575 }
576
577 if (aslc_req & ASLC_SET_ALS_ILLUM)
578 aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi);
579
580 if (aslc_req & ASLC_SET_BACKLIGHT)
581 aslc_stat |= asle_set_backlight(dev_priv, asle->bclp);
582
583 if (aslc_req & ASLC_SET_PFIT)
584 aslc_stat |= asle_set_pfit(dev_priv, asle->pfit);
585
586 if (aslc_req & ASLC_SET_PWM_FREQ)
587 aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb);
588
589 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
590 aslc_stat |= asle_set_supported_rotation_angles(dev_priv,
591 asle->srot);
592
593 if (aslc_req & ASLC_BUTTON_ARRAY)
594 aslc_stat |= asle_set_button_array(dev_priv, asle->iuer);
595
596 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
597 aslc_stat |= asle_set_convertible(dev_priv, asle->iuer);
598
599 if (aslc_req & ASLC_DOCKING_INDICATOR)
600 aslc_stat |= asle_set_docking(dev_priv, asle->iuer);
601
602 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
603 aslc_stat |= asle_isct_state(dev_priv);
604
605 asle->aslc = aslc_stat;
606 }
607
intel_opregion_asle_intr(struct drm_i915_private * dev_priv)608 void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
609 {
610 if (dev_priv->opregion.asle)
611 schedule_work(&dev_priv->opregion.asle_work);
612 }
613
614 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
615 #define ACPI_EV_LID (1<<1)
616 #define ACPI_EV_DOCK (1<<2)
617
618 /*
619 * The only video events relevant to opregion are 0x80. These indicate either a
620 * docking event, lid switch or display switch request. In Linux, these are
621 * handled by the dock, button and video drivers.
622 */
intel_opregion_video_event(struct notifier_block * nb,unsigned long val,void * data)623 static int intel_opregion_video_event(struct notifier_block *nb,
624 unsigned long val, void *data)
625 {
626 struct intel_opregion *opregion = container_of(nb, struct intel_opregion,
627 acpi_notifier);
628 struct acpi_bus_event *event = data;
629 struct opregion_acpi *acpi;
630 int ret = NOTIFY_OK;
631
632 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
633 return NOTIFY_DONE;
634
635 acpi = opregion->acpi;
636
637 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
638 ret = NOTIFY_BAD;
639
640 acpi->csts = 0;
641
642 return ret;
643 }
644
645 /*
646 * Initialise the DIDL field in opregion. This passes a list of devices to
647 * the firmware. Values are defined by section B.4.2 of the ACPI specification
648 * (version 3)
649 */
650
set_did(struct intel_opregion * opregion,int i,u32 val)651 static void set_did(struct intel_opregion *opregion, int i, u32 val)
652 {
653 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
654 opregion->acpi->didl[i] = val;
655 } else {
656 i -= ARRAY_SIZE(opregion->acpi->didl);
657
658 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
659 return;
660
661 opregion->acpi->did2[i] = val;
662 }
663 }
664
acpi_display_type(struct intel_connector * connector)665 static u32 acpi_display_type(struct intel_connector *connector)
666 {
667 u32 display_type;
668
669 switch (connector->base.connector_type) {
670 case DRM_MODE_CONNECTOR_VGA:
671 case DRM_MODE_CONNECTOR_DVIA:
672 display_type = ACPI_DISPLAY_TYPE_VGA;
673 break;
674 case DRM_MODE_CONNECTOR_Composite:
675 case DRM_MODE_CONNECTOR_SVIDEO:
676 case DRM_MODE_CONNECTOR_Component:
677 case DRM_MODE_CONNECTOR_9PinDIN:
678 case DRM_MODE_CONNECTOR_TV:
679 display_type = ACPI_DISPLAY_TYPE_TV;
680 break;
681 case DRM_MODE_CONNECTOR_DVII:
682 case DRM_MODE_CONNECTOR_DVID:
683 case DRM_MODE_CONNECTOR_DisplayPort:
684 case DRM_MODE_CONNECTOR_HDMIA:
685 case DRM_MODE_CONNECTOR_HDMIB:
686 display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL;
687 break;
688 case DRM_MODE_CONNECTOR_LVDS:
689 case DRM_MODE_CONNECTOR_eDP:
690 case DRM_MODE_CONNECTOR_DSI:
691 display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL;
692 break;
693 case DRM_MODE_CONNECTOR_Unknown:
694 case DRM_MODE_CONNECTOR_VIRTUAL:
695 display_type = ACPI_DISPLAY_TYPE_OTHER;
696 break;
697 default:
698 MISSING_CASE(connector->base.connector_type);
699 display_type = ACPI_DISPLAY_TYPE_OTHER;
700 break;
701 }
702
703 return display_type;
704 }
705
intel_didl_outputs(struct drm_i915_private * dev_priv)706 static void intel_didl_outputs(struct drm_i915_private *dev_priv)
707 {
708 struct intel_opregion *opregion = &dev_priv->opregion;
709 struct intel_connector *connector;
710 struct drm_connector_list_iter conn_iter;
711 int i = 0, max_outputs;
712 int display_index[16] = {};
713
714 /*
715 * In theory, did2, the extended didl, gets added at opregion version
716 * 3.0. In practice, however, we're supposed to set it for earlier
717 * versions as well, since a BIOS that doesn't understand did2 should
718 * not look at it anyway. Use a variable so we can tweak this if a need
719 * arises later.
720 */
721 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
722 ARRAY_SIZE(opregion->acpi->did2);
723
724 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
725 for_each_intel_connector_iter(connector, &conn_iter) {
726 u32 device_id, type;
727
728 device_id = acpi_display_type(connector);
729
730 /* Use display type specific display index. */
731 type = (device_id & ACPI_DISPLAY_TYPE_MASK)
732 >> ACPI_DISPLAY_TYPE_SHIFT;
733 device_id |= display_index[type]++ << ACPI_DISPLAY_INDEX_SHIFT;
734
735 connector->acpi_device_id = device_id;
736 if (i < max_outputs)
737 set_did(opregion, i, device_id);
738 i++;
739 }
740 drm_connector_list_iter_end(&conn_iter);
741
742 DRM_DEBUG_KMS("%d outputs detected\n", i);
743
744 if (i > max_outputs)
745 DRM_ERROR("More than %d outputs in connector list\n",
746 max_outputs);
747
748 /* If fewer than max outputs, the list must be null terminated */
749 if (i < max_outputs)
750 set_did(opregion, i, 0);
751 }
752
intel_setup_cadls(struct drm_i915_private * dev_priv)753 static void intel_setup_cadls(struct drm_i915_private *dev_priv)
754 {
755 struct intel_opregion *opregion = &dev_priv->opregion;
756 struct intel_connector *connector;
757 struct drm_connector_list_iter conn_iter;
758 int i = 0;
759
760 /*
761 * Initialize the CADL field from the connector device ids. This is
762 * essentially the same as copying from the DIDL. Technically, this is
763 * not always correct as display outputs may exist, but not active. This
764 * initialization is necessary for some Clevo laptops that check this
765 * field before processing the brightness and display switching hotkeys.
766 *
767 * Note that internal panels should be at the front of the connector
768 * list already, ensuring they're not left out.
769 */
770 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
771 for_each_intel_connector_iter(connector, &conn_iter) {
772 if (i >= ARRAY_SIZE(opregion->acpi->cadl))
773 break;
774 opregion->acpi->cadl[i++] = connector->acpi_device_id;
775 }
776 drm_connector_list_iter_end(&conn_iter);
777
778 /* If fewer than 8 active devices, the list must be null terminated */
779 if (i < ARRAY_SIZE(opregion->acpi->cadl))
780 opregion->acpi->cadl[i] = 0;
781 }
782
swsci_setup(struct drm_i915_private * dev_priv)783 static void swsci_setup(struct drm_i915_private *dev_priv)
784 {
785 struct intel_opregion *opregion = &dev_priv->opregion;
786 bool requested_callbacks = false;
787 u32 tmp;
788
789 /* Sub-function code 0 is okay, let's allow them. */
790 opregion->swsci_gbda_sub_functions = 1;
791 opregion->swsci_sbcb_sub_functions = 1;
792
793 /* We use GBDA to ask for supported GBDA calls. */
794 if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
795 /* make the bits match the sub-function codes */
796 tmp <<= 1;
797 opregion->swsci_gbda_sub_functions |= tmp;
798 }
799
800 /*
801 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
802 * must not call interfaces that are not specifically requested by the
803 * bios.
804 */
805 if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
806 /* here, the bits already match sub-function codes */
807 opregion->swsci_sbcb_sub_functions |= tmp;
808 requested_callbacks = true;
809 }
810
811 /*
812 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
813 * the callback is _requested_. But we still can't call interfaces that
814 * are not requested.
815 */
816 if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
817 /* make the bits match the sub-function codes */
818 u32 low = tmp & 0x7ff;
819 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
820 tmp = (high << 4) | (low << 1) | 1;
821
822 /* best guess what to do with supported wrt requested */
823 if (requested_callbacks) {
824 u32 req = opregion->swsci_sbcb_sub_functions;
825 if ((req & tmp) != req)
826 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
827 /* XXX: for now, trust the requested callbacks */
828 /* opregion->swsci_sbcb_sub_functions &= tmp; */
829 } else {
830 opregion->swsci_sbcb_sub_functions |= tmp;
831 }
832 }
833
834 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
835 opregion->swsci_gbda_sub_functions,
836 opregion->swsci_sbcb_sub_functions);
837 }
838
intel_no_opregion_vbt_callback(const struct dmi_system_id * id)839 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
840 {
841 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
842 "VBIOS ROM for %s\n", id->ident);
843 return 1;
844 }
845
846 static const struct dmi_system_id intel_no_opregion_vbt[] = {
847 {
848 .callback = intel_no_opregion_vbt_callback,
849 .ident = "ThinkCentre A57",
850 .matches = {
851 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
852 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
853 },
854 },
855 { }
856 };
857
intel_load_vbt_firmware(struct drm_i915_private * dev_priv)858 static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv)
859 {
860 struct intel_opregion *opregion = &dev_priv->opregion;
861 const struct firmware *fw = NULL;
862 const char *name = i915_modparams.vbt_firmware;
863 int ret;
864
865 if (!name || !*name)
866 return -ENOENT;
867
868 ret = request_firmware(&fw, name, &dev_priv->drm.pdev->dev);
869 if (ret) {
870 DRM_ERROR("Requesting VBT firmware \"%s\" failed (%d)\n",
871 name, ret);
872 return ret;
873 }
874
875 if (intel_bios_is_valid_vbt(fw->data, fw->size)) {
876 opregion->vbt_firmware = kmemdup(fw->data, fw->size, GFP_KERNEL);
877 if (opregion->vbt_firmware) {
878 DRM_DEBUG_KMS("Found valid VBT firmware \"%s\"\n", name);
879 opregion->vbt = opregion->vbt_firmware;
880 opregion->vbt_size = fw->size;
881 ret = 0;
882 } else {
883 ret = -ENOMEM;
884 }
885 } else {
886 DRM_DEBUG_KMS("Invalid VBT firmware \"%s\"\n", name);
887 ret = -EINVAL;
888 }
889
890 release_firmware(fw);
891
892 return ret;
893 }
894
intel_opregion_setup(struct drm_i915_private * dev_priv)895 int intel_opregion_setup(struct drm_i915_private *dev_priv)
896 {
897 struct intel_opregion *opregion = &dev_priv->opregion;
898 struct pci_dev *pdev = dev_priv->drm.pdev;
899 u32 asls, mboxes;
900 char buf[sizeof(OPREGION_SIGNATURE)];
901 int err = 0;
902 void *base;
903 const void *vbt;
904 u32 vbt_size;
905
906 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
907 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
908 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
909 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
910 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
911
912 pci_read_config_dword(pdev, ASLS, &asls);
913 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
914 if (asls == 0) {
915 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
916 return -ENOTSUPP;
917 }
918
919 INIT_WORK(&opregion->asle_work, asle_work);
920
921 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
922 if (!base)
923 return -ENOMEM;
924
925 memcpy(buf, base, sizeof(buf));
926
927 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
928 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
929 err = -EINVAL;
930 goto err_out;
931 }
932 opregion->header = base;
933 opregion->lid_state = base + ACPI_CLID;
934
935 DRM_DEBUG_DRIVER("ACPI OpRegion version %u.%u.%u\n",
936 opregion->header->over.major,
937 opregion->header->over.minor,
938 opregion->header->over.revision);
939
940 mboxes = opregion->header->mboxes;
941 if (mboxes & MBOX_ACPI) {
942 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
943 opregion->acpi = base + OPREGION_ACPI_OFFSET;
944 }
945
946 if (mboxes & MBOX_SWSCI) {
947 DRM_DEBUG_DRIVER("SWSCI supported\n");
948 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
949 swsci_setup(dev_priv);
950 }
951
952 if (mboxes & MBOX_ASLE) {
953 DRM_DEBUG_DRIVER("ASLE supported\n");
954 opregion->asle = base + OPREGION_ASLE_OFFSET;
955
956 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
957 }
958
959 if (mboxes & MBOX_ASLE_EXT)
960 DRM_DEBUG_DRIVER("ASLE extension supported\n");
961
962 if (intel_load_vbt_firmware(dev_priv) == 0)
963 goto out;
964
965 if (dmi_check_system(intel_no_opregion_vbt))
966 goto out;
967
968 if (opregion->header->over.major >= 2 && opregion->asle &&
969 opregion->asle->rvda && opregion->asle->rvds) {
970 resource_size_t rvda = opregion->asle->rvda;
971
972 /*
973 * opregion 2.0: rvda is the physical VBT address.
974 *
975 * opregion 2.1+: rvda is unsigned, relative offset from
976 * opregion base, and should never point within opregion.
977 */
978 if (opregion->header->over.major > 2 ||
979 opregion->header->over.minor >= 1) {
980 WARN_ON(rvda < OPREGION_SIZE);
981
982 rvda += asls;
983 }
984
985 opregion->rvda = memremap(rvda, opregion->asle->rvds,
986 MEMREMAP_WB);
987
988 vbt = opregion->rvda;
989 vbt_size = opregion->asle->rvds;
990 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
991 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n");
992 opregion->vbt = vbt;
993 opregion->vbt_size = vbt_size;
994 goto out;
995 } else {
996 DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (RVDA)\n");
997 memunmap(opregion->rvda);
998 opregion->rvda = NULL;
999 }
1000 }
1001
1002 vbt = base + OPREGION_VBT_OFFSET;
1003 /*
1004 * The VBT specification says that if the ASLE ext mailbox is not used
1005 * its area is reserved, but on some CHT boards the VBT extends into the
1006 * ASLE ext area. Allow this even though it is against the spec, so we
1007 * do not end up rejecting the VBT on those boards (and end up not
1008 * finding the LCD panel because of this).
1009 */
1010 vbt_size = (mboxes & MBOX_ASLE_EXT) ?
1011 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
1012 vbt_size -= OPREGION_VBT_OFFSET;
1013 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1014 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1015 opregion->vbt = vbt;
1016 opregion->vbt_size = vbt_size;
1017 } else {
1018 DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
1019 }
1020
1021 out:
1022 return 0;
1023
1024 err_out:
1025 memunmap(base);
1026 return err;
1027 }
1028
intel_use_opregion_panel_type_callback(const struct dmi_system_id * id)1029 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
1030 {
1031 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
1032 return 1;
1033 }
1034
1035 static const struct dmi_system_id intel_use_opregion_panel_type[] = {
1036 {
1037 .callback = intel_use_opregion_panel_type_callback,
1038 .ident = "Conrac GmbH IX45GM2",
1039 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
1040 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
1041 },
1042 },
1043 { }
1044 };
1045
1046 int
intel_opregion_get_panel_type(struct drm_i915_private * dev_priv)1047 intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
1048 {
1049 u32 panel_details;
1050 int ret;
1051
1052 ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1053 if (ret) {
1054 DRM_DEBUG_KMS("Failed to get panel details from OpRegion (%d)\n",
1055 ret);
1056 return ret;
1057 }
1058
1059 ret = (panel_details >> 8) & 0xff;
1060 if (ret > 0x10) {
1061 DRM_DEBUG_KMS("Invalid OpRegion panel type 0x%x\n", ret);
1062 return -EINVAL;
1063 }
1064
1065 /* fall back to VBT panel type? */
1066 if (ret == 0x0) {
1067 DRM_DEBUG_KMS("No panel type in OpRegion\n");
1068 return -ENODEV;
1069 }
1070
1071 /*
1072 * So far we know that some machined must use it, others must not use it.
1073 * There doesn't seem to be any way to determine which way to go, except
1074 * via a quirk list :(
1075 */
1076 if (!dmi_check_system(intel_use_opregion_panel_type)) {
1077 DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
1078 return -ENODEV;
1079 }
1080
1081 return ret - 1;
1082 }
1083
intel_opregion_register(struct drm_i915_private * i915)1084 void intel_opregion_register(struct drm_i915_private *i915)
1085 {
1086 struct intel_opregion *opregion = &i915->opregion;
1087
1088 if (!opregion->header)
1089 return;
1090
1091 if (opregion->acpi) {
1092 opregion->acpi_notifier.notifier_call =
1093 intel_opregion_video_event;
1094 register_acpi_notifier(&opregion->acpi_notifier);
1095 }
1096
1097 intel_opregion_resume(i915);
1098 }
1099
intel_opregion_resume(struct drm_i915_private * i915)1100 void intel_opregion_resume(struct drm_i915_private *i915)
1101 {
1102 struct intel_opregion *opregion = &i915->opregion;
1103
1104 if (!opregion->header)
1105 return;
1106
1107 if (opregion->acpi) {
1108 intel_didl_outputs(i915);
1109 intel_setup_cadls(i915);
1110
1111 /*
1112 * Notify BIOS we are ready to handle ACPI video ext notifs.
1113 * Right now, all the events are handled by the ACPI video
1114 * module. We don't actually need to do anything with them.
1115 */
1116 opregion->acpi->csts = 0;
1117 opregion->acpi->drdy = 1;
1118 }
1119
1120 if (opregion->asle) {
1121 opregion->asle->tche = ASLE_TCHE_BLC_EN;
1122 opregion->asle->ardy = ASLE_ARDY_READY;
1123 }
1124
1125 intel_opregion_notify_adapter(i915, PCI_D0);
1126 }
1127
intel_opregion_suspend(struct drm_i915_private * i915,pci_power_t state)1128 void intel_opregion_suspend(struct drm_i915_private *i915, pci_power_t state)
1129 {
1130 struct intel_opregion *opregion = &i915->opregion;
1131
1132 if (!opregion->header)
1133 return;
1134
1135 intel_opregion_notify_adapter(i915, state);
1136
1137 if (opregion->asle)
1138 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
1139
1140 cancel_work_sync(&i915->opregion.asle_work);
1141
1142 if (opregion->acpi)
1143 opregion->acpi->drdy = 0;
1144 }
1145
intel_opregion_unregister(struct drm_i915_private * i915)1146 void intel_opregion_unregister(struct drm_i915_private *i915)
1147 {
1148 struct intel_opregion *opregion = &i915->opregion;
1149
1150 intel_opregion_suspend(i915, PCI_D1);
1151
1152 if (!opregion->header)
1153 return;
1154
1155 if (opregion->acpi_notifier.notifier_call) {
1156 unregister_acpi_notifier(&opregion->acpi_notifier);
1157 opregion->acpi_notifier.notifier_call = NULL;
1158 }
1159
1160 /* just clear all opregion memory pointers now */
1161 memunmap(opregion->header);
1162 if (opregion->rvda) {
1163 memunmap(opregion->rvda);
1164 opregion->rvda = NULL;
1165 }
1166 if (opregion->vbt_firmware) {
1167 kfree(opregion->vbt_firmware);
1168 opregion->vbt_firmware = NULL;
1169 }
1170 opregion->header = NULL;
1171 opregion->acpi = NULL;
1172 opregion->swsci = NULL;
1173 opregion->asle = NULL;
1174 opregion->vbt = NULL;
1175 opregion->lid_state = NULL;
1176 }
1177
